This TTL counter was found in the March 1991 issue of Radio Electronics magazine. The circuit is part of a larger project and must be powered by a 5V voltage.
This is the receiver for the previous circuit found in the November 1991 Radio Electronics...
This circuit was found in a Popular Electronics from the 90s. The components admit equivalents and the...
This circuit for the car can be found in other versions in this section. This is from an 80's...